Former FBI Director James Comey can only sit back and watch as his Trump-Russia investigation is ultimately carried out by Special Counsel Robert Mueller. Trump fired Comey to try to sabotage the investigation, leaving Comey sidelined even as Mueller picks Trump apart. That hasn’t kept Comey from periodically weighing in, however. Just as Trump was taking the stage for an embarrassingly narcissistic display at a pointless rally on Friday night, Comey took to Twitter to slam him.

Comey has taken to largely speaking in historical quotes, and as the narcissistic Trump was taking the stage to seek applause from his remaining fanatics, Comey settled on a quote from Edmund Burke. Comey tweeted “Applause is the spur of noble minds, the end and aim of weak ones.” There was no question whatsoever that Comey was aiming his quote directly at Trump, and thus calling him “weak.”

James Comey doesn’t tweet often, but when he does, it’s usually a response or veiled warning shot at Trump. For instance, his previous tweet was about a meeting with the publisher of his upcoming book, which is largely an expose into his troubling stretch dealing with Trump: “In NYC to meet with my publisher. Hope leadership book will be useful. Reassuring to see Lady Liberty standing tall even in rough weather.”

Meanwhile Robert Mueller has arrested four of Donald Trump’s people in the Russia scandal, and two of them have already pleaded guilty. The investigation is still ramping up, and it’s a matter of when, not if, Trump is taken down.